Preparation of new types of electrode material is of great importance to supercapacitors. Herein, a graphene/bismuth vanadate (GR/BiVO) free-standing monolith composite has been prepared a hydrothermal process. Flexible GR sheets act as a skeleton in the GR/BiVO monolith composites. When used as a binder-free electrode in a three-electrode system, the GR/BiVO composite electrode can provide an impressive specific capacitance of 479 F g in a potential window of -1.1 to 0.7 V SCE at a current density of 5 A g. A symmetrical supercapacitor cell which can be reversibly charged-discharged at a cell voltage of 1.6 V has been assembled based on this GR/BiVO monolith composite. The symmetrical capacitor can deliver an energy density of 45.69 W h kg at a power density of 800 W kg. Moreover, it ensures rapid energy delivery of 10.75 W h kg with a power density of 40 kW kg.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9082335 | PMC |
| http://dx.doi.org/10.1039/c8ra04200d | DOI Listing |
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